What this 100 A MCCB does on the line
The Schneider Electric C11F34V100B is a ComPacT NSXm moulded-case circuit breaker rated 100 A at 40 °C, with a 36 kA interrupting capacity at 415 V AC — that F performance level means it clears faults up to that current without the arc re-striking, which is what keeps downstream gear from cooking on a bolted fault. Integrated earth-leakage protection is built in, with selectable sensitivity from 30 mA up to 5 A for both class A and class AC residual currents — that saves an external RCCB and a module of DIN rail space in a distribution board.
Panel fit and mounting reality
Three-pole (3P) design, 144 mm high by 108 mm wide by 80 mm deep, mounts on a backplate — not a DIN rail, so plan for a drilled mounting plate or an enclosure backpan. The 9-module pitch (9 x 9 mm = 81 mm wide footprint) matches standard modular enclosure cutouts. Connection pitch is 35 mm with spreaders, 27 mm without — that matters when you're laying out busbar runs or ordering pre-drilled lugs.
Lifecycle and compliance posture
Operating altitude is 2000 m without derating, 5000 m with derating; relative humidity 0–95 %. Electrical durability is 20,000 cycles at 440 V at rated current (In/2) and 10,000 cycles at full In — that's typical for a distribution breaker; not a switching device for frequent motor starts, but fine for infrequent manual isolation or backup protection.